ARCore – 渲染距离相机 200m 的物体 [英] ARCore – Rendering objects 200m far from camera

问题描述

我正在使用 ARCore 和 Sceneform 开发 Android AR 项目.我需要将对象放置在距离用户相机 30 米到 200 米远的位置，并面临 ArCore 中的视锥剔除问题，如这里.

I'm working on Android AR project using ARCore and Sceneform. I need to place the objects from 30 meters to 200 meters far from user's camera and faced with the frustum culling issue in ArCore, described HERE.

我正在尝试设置投影矩阵以使用此方法增加far参数

I'm trying to set projection matrix to increase the far parameter using this method

public void getProjectionMatrix (float[] dest, 
                                 int offset, 
                                 float near, 
                                 float far);

但是我找不到设置渲染投影矩阵的可能性.

But I can't find possibility to set the rendering projection matrix.

这是我的代码:

arFragment.arSceneView.apply {
    scene.addOnUpdateListener {
        // Some code to return from this callback if arFrame is not initialised yet
        if (!objectsAdded) {
            placeObject(Pose.makeTranslation(0f, 100f, 100f), this)
            objectsAdded = true
            scene.camera.projectionMatrix = Matrix(computeProjectionMatrix(frame.camera))
            // P.S. frame.camera is ArCore's camera, scene.camera is Sceneform's one.
            // So, I'm not sure that using them in such way is consistent  
        }
    }
}

setProjectionMatrix 方法包含注释 VisibleForTesting.所以，我不确定我是否应该使用它，并且可以保证它会起作用.

setProjectionMatrix method contains annotation VisibleForTesting. So, I'm not sure if I should use it and there is a guarantee that it will work.

请问我是否可以通过其他方式做到这一点?如果不是，那么让用户看到远处放置的对象的最佳方法是什么?

Please, advice if I can do it in some other way? If no, what the best way to do far placed objects visible for user?

提前致谢.

推荐答案

经过深入调查，我发现目前(2019 年 3 月)无法设置 ARCamera 的远裁剪面和近裁剪面.

等 Google 允许 ARCore 开发者使用它.

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